/Engine/Source/Runtime/Engine/Public/Animation/AnimCurveTypes.h
Blend with Other using Alpha, same as Lerp
template<typename OtherAllocator, typename OtherElementType> void LerpTo ( const [TBaseBlendedCurve](API\Runtime\Engine\Animation\TBaseBlendedCurve)< OtherAllocator, OtherElementType > & Other, float Alpha )